Flashlight lamp



1953 P. SARABER 2,662,968

FLASHLIGHT LAMP Filed March 7, 1951 IN VENTOR lguires a relativelyappreciable time. more, the conveyance ,of the two separate components,i. e. the :flash gun and the reflector, is

Patented Dec. 15, 1953 UNITED '?S TATES ENT 2,662,958

FLASHLIGHT LAMP eter S rabe qs ar, German Application March 7, 1951SBIiQIINOJZlQZGI Claims -priority,appli cation1Germany:May2,-:1950

3 Claims. a

J! The invention refers to a flashlight-photography flash gun withfolding reflector, especially already known, in whichthe-reflectorconsists of a ,numberof separate parts. In such case,.however, the reflector when folded, cannot remain attached .to the flashgun. The preparation ,for

use of these known flash guns consequently re- Furtherexceedinglyinconvenient.

Contrary to these known flashguns with reflectors, the reflector inaccordance with the present invention consists of such thin, elasticfoil, e. g. sheet steeLor sheet bronze, that it is easily rolled .up and,after ,unrolling automatically assumes its original form. This newrollup reflector can be made-in one piece and remain firmly-attachedto-its flash gun even in its rolled condition.

The reflector is rolled up by drawing or alternatively pressing it downinto the flash gun casing in such manner that when rolled up thereflector is housed inside the said casing.

The flash gun casing is suitably provided in one side with a slopeacting as a guide in rolling up the reflector.

In accordance with a specific form of arrangement the withdrawal of thereflector into the flash gun casing is effected by means of an operatingbutton or the like, connected with the reflector and movable in a guideslot in the casing.

The advantages of the flash gun in accordance with the invention areessentially the very simple and consequently cheap construction, theinstant readiness for use and the small dimensions of the reflector inthe rolled-up state.

An additional advantageous feature according to the invention is thatthe displacement of the operating button in the guide slot of the flashgun casing not only serves to roll up or unroll the reflector but alsoenables the concavity of the reflector, i. e. its radius of curvature,to be adjustably varied.

The principle of the invention is applicable both to flash gun lamps ofthe type known by the trade-mark Vaku-Blitz and to flash gun lamps r ofhigh-tension type, as well as to lamps working with flashlight powder.

The drawing represents an example of an arrangement according to theprinciple of the invention and shows further advantageous and novel;features thereof. The drawin .Shows a flashlight-photography flash gunof the Valiu- Blitz type.

Figure 1 is a front view of the flashlightphotog-raphy gflash gun.comprising my invention shown fully assembled ready {for use;

.Fig. .2 is a side viewof the flashlight-photography flash gun shown in,Fig. ,1

Fig.3 is a view (similar to Fig. 2, but showing the reflector partiallyretracted preparatory to afolding operation;

Fig. 4-. is a front view of the flashlight photography flash gun shownin Fig. 3 and ShOW-illgr'thfi partially retracted reflector;

Fig. 5 is averticalsectionalview through the fully-folded flashlightphotography flash gun with certain parts shown in elevation;

Fig. 6 is ,a rear view of the flashlight-photog- 'raphy flash gunshowing the reflector fully 9-4! of Fig. 5 showing the reflector fullynested in the casing; and

Fig. 10 is a perspective view showing the 00- action between theangularly disposed edges of the lamp casing and the angularly disposededges of the reflector for facilitating the rolling and unrolling of thereflector with respect to the lamp casing as the reflector is movedlongitudinally with respect to the lamp casing.

The flash gun consists of a barrel I with a lamp holder 2 receiving alamp 3 of the Vaku- Blitz type, a base 4, an outer casing 6 and areflector 8. One or more dry cells 5 can be accommodated in the usualmanner in the barrel The casing 5 surrounds the barrel I in such mannerthat an annular air gap 1 is left between the barrel and the casing 6.

The reflector, which may be of other form than here shown, consists of athin foil 8 of suitably resilient material, e. g., sheet steel or sheetbronze. The reflector 8 is provided with an operating button 9 movablein a longitudinally disposed guide slot is in the casing in such mannerthat by moving the button 3 the reflector 8 can be drawn down into theair gap 1. By suitably forming the slope of edges l2 of the casing 6 onopposite sides of a central recess 15, the reflector 8 is caused to rollup on itself when the edges l5 thereof are drawn down by the action ofthe button 9 against the edges I 2 of the casing which serve as lineallyextending cams for guiding the reflector. The opposite sides of theupper peripheral edges of casing 6 are cut-away in a recess l5 and areangularly inclined downwardly from positions spaced substantially morethan 180 to a substantially V-shaped terminus rounded at the bottom ofrecess [5 in the top of the front of the casing facing forward in thedirection of the light rays reflected by the reflector 8. The upper part[3 of the casing 6 and the lower part II of the reflector 8 are suitablyso shaped that the curvature of the reflector 8 in its highest positionis only slight. The guide slot I is located in the rear of the casingextending from the upper part [3 of the casing to substantially thebottom of the casing. That is to say, the slot H] is located in part ofthe Wall section of maximum length. The edges [5 of the lower part ll ofthe reflector 8 are formed on an angle a with respect to the slope ofedges !2 which is slightly obtuse, so that edges l2 and i6 coact toeffect the rolling and unrolling of the reflector 8 as button 9 ismoved. The concavity or curvature of the reflector 8 can be adjusted atwill by drawing down the operating button 9 more or less into the guideslot l0. By this means, curvatures of different radii can be obtained onthe reflector 8, according to the conditions of exposure. Therectangular slot 1 M in the base 4 serves for the attachment of theflash gun on a holder.

I claim:

1. A flashlight-photography flash gun comprising a cylindrical barreladapted to house current-storing and supplying means, a lamp holder atone end of said barrel adapted to support and hold a lamp externally ofthe latter, a cylindrical outer casing surrounding said barrel andspaced therefrom around the longitudinal external wall peripherythereof, said outer casing being partly cut-away at its end adjacent thelamp holder to provide a tapered guideway having opposite edges inclinedto the longitudinal axis of the casing from positions spacedsubstantially more than to a terminus in the front of the casing andsaid casing having a longitudinal slot in a part of its wall section ofmaximum length, a reflector of elastic metal foil housed in the spacebetween the barrel and the outer casing, with its central longitudinalaxis immediately adjacent said slot, said reflector having upwardlyinclined opposite edges coacting with the inclined edges of saidguideway, and a stud secured to said reflector on the longitudinal axisof the latter and protruding through said slot to the exterior of theouter casing for moving the reflector longitudinally from its housing toa position adjacent the lamp holder, and vice versa, said, upwardlyinclined edges of said reflector and the downwardly inclined edges ofsaid guide- Way coacting through a camming action to control theunrolling and rolling-up of said reflector.

2. A flashlight-photography flash gun as set forth in claim 1, in whichthe downwardly inclined edges of said tapered guideway and the upwardlyinclined opposite edges of said reflector are related to each other byangles that are slightly obtuse.

3. A flashlight-photography flash gun as set forth in claim 1 in whichthe edges of the recess constituting the tapered guideway in the frontof said casing intersect in a substantially V- shaped terminus.

PETER SARABER.

References Cited in the file of this patent UNITED STATES PATENTS Number

